Controlling Access to Memory Cells

2. The method of claim 1, wherein the determining the access relationship of the second tenant comprises retrieving the access relationship of the second tenant from a table, the table configured to record access relationships between the first tenant and other tenants, and access relationships of the other tenants in access relationships.

3. The method of claim 1, wherein the determining the access relationship of the second tenant comprises receiving first data from the first tenant portal, the first data including an information that specifies the access relationship between the first tenant and the second tenant.

5. The non-transitory computer-readable medium storing computer code of claim 4, wherein the determining the access relationship of the second tenant comprises retrieving the access relationship of the second tenant from a table, the table configured to record access relationships between the first tenant and other tenants, and access relationships of the other tenants in access relationships.

6. The non-transitory computer-readable medium storing computer code of claim 4, wherein the determining the access relationship of the second tenant comprises receiving first data from the first tenant portal, the first data including an information that specifies the access relationship between the first tenant and the second tenant.

8. The system of claim 7, wherein the determining the access relationship of the second tenant comprises retrieving the access relationship of the second tenant from a table, the table configured to record access relationships between the first tenant and other tenants, and access relationships of the other tenants in access relationships.

9. The system of claim 7, wherein the determining the access relationship of the second tenant comprises receiving first data from the first tenant portal, the first data including an information that specifies the access relationship between the first tenant and the second tenant.